Method of making wall-coating compounds.



pairs err ran union.

uoiann'r n. HAIRE, or PARIS,

ONTARIO, CANADA.

METHOD OF MAKING WALL-COATING COMPOUNDS.

No Drawing.

To all whom it may concern:

Be it known that 1, ROBERT E. Hanan, a subject of the King of Great Britain, residing at Paris, Ontario, Canada, have invented certain new and useful Improvements in Methods of Making Wall-Coating Compounds, of which the following is a specification.

My present process is for making an adhesive compound of animal glue and a base such as powdered gypsum, and is an improvement upon the process disclosed in Letters Patent of the United States granted to M. B. Church, 513,003, January 16, 1894. In carrying out that process hot glue was mixed with hot gypsum, and in preparing the glue for mixing with the gypsum the practice was to soak the dry sheets of glue in cold water and to heat the same until the glue dissolved and formed with the water a liquid mixture. This liquid glue was kept hot in a jacketed kettle, and it was gradually introduced into the kettle of calcined gypsum, while the latter was being heated, and thus the moisture was driven off. I found dilliculty, in carrying out that process, in maintaining the glue in its hot state and in spouting it or delivering it through pipes, in that the pipes being warmed, the glue would dry to some extent in transit, and being of a very thick, sticky consistency, adhered to the pipes and other parts of the apparatus, and to deal with it in this melted state caused great inconvenience and considerable expense. Further, some of the glue. of one batch would hold back and mix with that of the second batch, or in other words, it was diflicult to have the apparatus cleaned out prior to the introduction of a fresh batch thereinto, and the portion of the glue which remained over from one batch to the next would often become deteriorated, though re maining in liquid form, and the amount thus introduced in the different batches varied considerably, rendering the whole product uneven as to strength of size.

These diiiiculties are overcome and the process is rendered more simple and reliable, and the product is improved by my present process which consists, instead of using the glue in hot liquid form, of using it cold, and

Specification of Letters Patent.

Application filed June 7, 1915.

Patented July M, 1916.

Serial No. 32,740.

in the form ofa stiff elly. This jellied form of the glue can be attained in various ways, for instance, by soaking the glue in cold water until it has taken up about one and onequarter (1-1) times its weight of water, or by bringingliquid glue to a stiff jellied condition before introducing it into the dry powder to be so sized. This glue, in its cold and stiff jellied state, is dumped into the kettle containing the powdered pigment as, for instance, calcined gypsum, in the pro portions of six pounds of dry glue (which, with the water added in soaking, weighs approximately fourteen pounds) to one hundred pounds of powder. When so dumped into the gypsum kettle the glue, in its cold, jellied state, may he in one mass or in sepa rate flakes or portions.

The glue is placed in the gypsum while the latter is being heated in its kettle, and by agitating the gypsum and glue the latter is gradually taken up by the gypsum from the outside surface of the jellied glue mass or flakes, and thus becomes gradually and evenly incorporated throughout the gypsum or base. By this method I not only save the time necessary to bring the glue to a liquid state by heating, as in the old method, but the jellied glue mass or flakes can be handled or used with ease, and with certainty as to the result. Furthermore, the product is improved because, as stated, there is a gradual and even distribution of the glue throughout the base.

Any suitable agitating means may be employed within the kettle.

I do not confine myself to calcined gypsum as the dry powder or pigment with which the jellied glue is incorporated, as whiting or any dry pigment may be used in place of the calcined gypsum.

I claim as my invention:

1. The herein described method of making an adhesive compound of animal glue and a base, the latter in the form of a powder, consisting in adding cold glue in stiff, jellied form to the dry powder and agitating and heating said ingredients to mix them together, substantially as described.

2. The herein described method of making an adhesive compound of animal glue and a poivder base consisting in mixing the pow- In testimony whereof I aflix my signature der and; glue together by agitation While in presence of two Witnesses. heating, said glue, before'mixing, being in cold, stiff, jeilied form having incorporated ROBERT HAIRE therewith substantially one and one-quarter Witnesses:

times its Weight of Water, substantially as C: E. S. WINDUS,

described; V V H. J. HAIRE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

7 Washington, D. C. 

